/*
 *  Copyright 2005 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.questionnaire.answerOption;

import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.util.core.LocaleUtil;
import com.blandware.atleap.webapp.util.core.WebappConstants;
import com.blandware.atleap.webapp.util.questionnaire.QuestionnaireModuleWebConstants;
import com.blandware.atleap.model.questionnaire.Question;
import com.blandware.atleap.model.questionnaire.Questionnaire;
import com.blandware.atleap.service.questionnaire.QuestionnaireManager;
import com.blandware.atleap.common.QuestionnaireModuleConstants;
import org.apache.struts.action.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.List;

/**
 * <p>Returns page with form to create new answer option.
 * </p>
 * <p><a href="CallCreateAnswerOptionAction.java.html"><i>View source</i></a></p>
 *
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.2 $ $Date: 2007/12/11 14:23:49 $
 * @struts.action name="answerOptionForm"
 * path="/questionnaire/answerOption/callCreate"
 * validate="false"
 * roles="questionnaire-answerOption-create"
 * @struts.action-forward name="createAnswerOption"
 * path=".questionnaire.answerOption.create"
 * @struts.action-forward name="listAnswerOptions"
 * path="/questionnaire/answerOption/list.do"
 * redirect="true"
 * @struts.action-forward name="listQuestions"
 * path="/questionnaire/question/list.do"
 * redirect="true"
 */
public final class CallCreateAnswerOptionAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request,
                                 HttpServletResponse response)
            throws Exception {

        HttpSession session = request.getSession();
        Long questionId = (Long) session.getAttribute(QuestionnaireModuleWebConstants.QUESTION_ID_KEY);
        if (questionId == null) {
            if (log.isWarnEnabled()) {
                log.warn("Missing question ID. Returning to list...");
            }
            return mapping.findForward("listQuestions");
        }

		List contentLocales = LocaleUtil.getInstance(servlet.getServletContext()).getEnabledLocales();

		session.setAttribute(WebappConstants.CONTENT_LOCALES_COLLECTION_KEY, contentLocales);

        QuestionnaireManager questionnaireManager = (QuestionnaireManager) getBean(QuestionnaireModuleConstants.QUESTIONNAIRE_MANAGER_BEAN);
        Question question = questionnaireManager.retrieveQuestion(questionId);

        if (question == null) {
            // no question found
            ActionMessages errors = new ActionMessages();
            errors.add("ownerNotFound", new ActionMessage("questionnaire.answerOption.errors.ownerNotFound"));
            saveErrors(request, errors);
            saveToken(request);
            return mapping.findForward("listQuestions");
        }

        Questionnaire questionnaire = question.getQuestionnaire();
        if (questionnaire.getFixed().booleanValue()) {
            // questionnaire is fixed, it cannot be edited
            ActionMessages errors = new ActionMessages();
            errors.add("questionnaireIsFixed", new ActionMessage("questionnaire.questionnaire.errors.fixed"));
            saveErrors(request, errors);
            return mapping.findForward("listAnswerOptions");
        }

		// save transaction token in request
		saveToken(request);
		return mapping.findForward("createAnswerOption");
	}
}
